2007-05-03 16:51:52 · 5 answers · asked by Anonymous in Science & Mathematics ➔ Astronomy & Space
i mean 2 early ideas about planetary motions?
2007-05-03 16:57:51 · update #1
You must be referring to ideas related to the Universe of Aristotle and Ptolemy (which both predate today's established Copernican heliocentric model). Both models put the Earth at the centre of the Universe.
- Aristotle's model uses a system of 55 concentric crystalline spheres moving at different speeds to explain the different velocities of the planets.
- Ptolemey's model uses an elaborate system of epicycles, putting the planets not in concentric spheres but in circles attached to the spheres.
2007-05-04 15:36:02 · answer #1 · answered by stardom65 3 · 0⤊ 0⤋
the earth was flat, and the sun revolves around the earth meaning earth was in the center of everything.
2007-05-04 00:36:01 · answer #2 · answered by Alucard 3 · 0⤊ 0⤋
I can give you one, every thing revolved around the earth, and you'd be labeled a heretic and your life would be in danger if you said otherwise.
2007-05-03 23:57:52 · answer #3 · answered by tinkertailorcandlestickmaker 7 · 0⤊ 2⤋
Just my opinion, stardom65's answer is as complete, concise, and accurate as you could ever hope for.
2007-05-07 18:02:24 · answer #4 · answered by Brant 7 · 0⤊ 0⤋
6?
Six?
SIX?
Are you kidding?
2007-05-03 23:56:07 · answer #5 · answered by campbelp2002 7 · 0⤊ 1⤋